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Maintaining the MRC-921
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The MRC-921 is well constructed and durable;
however, it is a precision electronic device and must
be treated as such. Follow the procedures in this
section to ensure reliable service.
Operating conditions
The MRC-921 is designed to operate in environments
that are normally free of dust, dirt, and moisture. It
can be operated at temperatures between 50 degrees
F (10 degrees C) and 110 degrees F (43 degrees C).
Handling the MRC-921
•
Do not open the MRC-921. No user-serviceable
parts are inside.
•
Charge only nickel-cadmium battery packs that
have been designed for use in the PTC-921. Do not
recharge other types of rechargeable batteries or
any type of alkaline batteries.
•
Do not insert anything other than the specified
battery packs into the MRC-921’s spare battery bay.
•
If you store a battery pack in below-freezing
temperatures for more than 1 hour, do not charge
the battery pack until it warms up to room
temperature.
•
Protect the MRC-921 from excessive heat, cold,
moisture, and harsh, dirty environments.
•
Do not leave the MRC-921 where moisture can
condense on it.
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